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You are here: AR57 5.7x28mm Upper Kit
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A revolutionary new design that blends the ergonomics of the AR-15 lower with a lightweight, fast-handling upper receiver system chambered in the exciting new 5.7x28mm caliber. This ultrareliable unit is fed by a horizontal, top-mounted 50-round magazine (not included) atop the 16" E.R. Shaw barrel, and there's no gas system to clog or foul. The upper receiver and rails are precisely milled from a monolithic block of aircraft grade 7075 T6 aluminum. Kit includes a barrel, semiautomatic bolt, carbine buffer and manual. No FFL required.
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A revolutionary new design that blends the ergonomics of the AR-15 lower with a lightweight, fast-handling upper receiver system chambered in the exciting new 5.7x28mm caliber. No FFL required.
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Item: XK-230082
$699.99
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AR57 50-round magazine. Color: Translucent Black.
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Item: XK-230086
$29.99
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